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樓主  發(fā)表于: 2018-12-04 11:02
三菱PLC安裝程式的圓孔，查書(shū)說(shuō)是RS-422傳輸

有試過(guò)兩臺PLC直連，使用兩張RS-485-BD卡，達到連線(xiàn)功能

有人有試過(guò)....把安裝程式那一個(gè)孔......把RS-422.....四線(xiàn).......短路成RS-485....，這樣兩臺PLC可以實(shí)現 1：1連線(xiàn)嗎?

想說(shuō)...各省下一張BD卡........也可以連線(xiàn)之類(lèi)


PLC 上面 8孔

1 = Rx-
2 = Rx+
3 = SG
4 = Tx-
7 = Tx+

兩臺PLC的傳輸孔都拉出4條線(xiàn)，1和4接在一起當485的D-，2和7接在一起當485的D+，兩臺PLC中間只用一條兩芯電線(xiàn)連接

不知道能不能達到 1：1 的網(wǎng)路鹹線(xiàn)
[ 此帖被pr0911在2018-12-04 11:34重新編輯 ]

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